66474305 has 4 divisors (see below), whose sum is σ = 79769172. Its totient is φ = 53179440.

The previous prime is 66474283. The next prime is 66474319. The reversal of 66474305 is 50347466.

66474305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51782416 + 14691889 = 7196^2 + 3833^2 .

It is not a de Polignac number, because 66474305 - 2²⁰ = 65425729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6647426 + ... + 6647435.

It is an arithmetic number, because the mean of its divisors is an integer number (19942293).

Almost surely, 2^66474305 is an apocalyptic number.

It is an amenable number.

66474305 is a deficient number, since it is larger than the sum of its proper divisors (13294867).

66474305 is a wasteful number, since it uses less digits than its factorization.

66474305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13294866.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 66474305 is about 8153.1776014018. The cubic root of 66474305 is about 405.0897631652.

The spelling of 66474305 in words is "sixty-six million, four hundred seventy-four thousand, three hundred five".